drm/amd/display: Add HW cursor visual confirm

[WHY]
Added HW cursor visual confirm

[HOW]
Added visual confirm logic when programming cursor positions.
HW is programmed on cursor updates since cursor can change without flips.
Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Ryan Seto <ryanseto@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

@@ -416,6 +416,35 @@ bool dc_stream_program_cursor_position(
 		if (reset_idle_optimizations && !dc->debug.disable_dmub_reallow_idle)
 			dc_allow_idle_optimizations(dc, true);
 
+		/* apply/update visual confirm */
+		if (dc->debug.visual_confirm == VISUAL_CONFIRM_HW_CURSOR) {
+			/* update software state */
+			uint32_t color_value = MAX_TG_COLOR_VALUE;
+			int i;
+
+			for (i = 0; i < dc->res_pool->pipe_count; i++) {
+				struct pipe_ctx *pipe_ctx = &dc->current_state->res_ctx.pipe_ctx[i];
+
+				/* adjust visual confirm color for all pipes with current stream */
+				if (stream == pipe_ctx->stream) {
+					if (stream->cursor_position.enable) {
+						pipe_ctx->visual_confirm_color.color_r_cr = color_value;
+						pipe_ctx->visual_confirm_color.color_g_y = 0;
+						pipe_ctx->visual_confirm_color.color_b_cb = 0;
+					} else {
+						pipe_ctx->visual_confirm_color.color_r_cr = 0;
+						pipe_ctx->visual_confirm_color.color_g_y = 0;
+						pipe_ctx->visual_confirm_color.color_b_cb = color_value;
+					}
+
+					/* programming hardware */
+					if (pipe_ctx->plane_state)
+						dc->hwss.update_visual_confirm_color(dc, pipe_ctx,
+								pipe_ctx->plane_res.hubp->mpcc_id);
+				}
+			}
+		}
+
 		return true;
 	}
 

drivers/gpu/drm/amd/display/dc/dc.h

@@ -476,6 +476,7 @@ enum visual_confirm {
 	VISUAL_CONFIRM_SUBVP = 14,
 	VISUAL_CONFIRM_MCLK_SWITCH = 16,
 	VISUAL_CONFIRM_FAMS2 = 19,
+	VISUAL_CONFIRM_HW_CURSOR = 20,
 };
 
 enum dc_psr_power_opts {